Yup, that's the thing, Don't fall.
The rope helps for peace of mind when you're a few 1000' up feeling exposed.
So my formula would be a 60 or 70m rope with a guy at each end and one in the middle. If there is a piece between each guy, that means one picket/ screw/ fluke every 100'.
So 6 pickets will get you up 600' before the leader needs them back, and you'd want a belay to bring the other 2 guys up to to gather the gear back. Assume you make the belay from axes, the leader has to carry 6 pickets.
Personally I'd solo it, but the rope is nice to have.
Thanks Jake